What is quorum sensing?
Quick Answer
Quorum sensing is a chemical communication system bacteria use to detect their own population density. It helps them coordinate behavior such as biofilm formation and toxin production.
The Full Story
Quorum sensing allows bacteria to release and detect small signaling molecules, often called autoinducers, to estimate how many of them are nearby. When the signal reaches a threshold, many cells switch on the same genes at the same time. This coordinated behavior can help bacteria form biofilms, glow, move together, or produce virulence factors. The concept became well known through research in marine bacteria such as Vibrio fischeri, which use it to control bioluminescence.
Key Facts
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Suggested video title for this topic:
"How bacteria talk to each other"
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